docs: def list(gandi, id, limit):
      """ List SSH keys. """
      options = {
          'items_per_page': limit,
      }
  
      output_keys = ['name', 'fingerprint']
  
      if id:
          output_keys.append('id')
  
      result = gandi.sshkey.list(options)
      for num, sshkey in enumerate(result):
          if num:
              gandi.separator_line()
          output_sshkey(gandi, sshkey, output_keys)
  
      return result